Desk adapter for removably mounting a portable file storage box



FIG. 1 is a perspective view of a desk adapter for removably mounting a portable file storage box showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a right side elevation view thereof;

FIG. 4 is a left side elevation view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a front elevation view thereof;

FIG. 7 is a rear elevation view thereof; and,

FIG. 8 is a perspective view thereof, with a portable file storage box and part of a desk shown in broken lines for purposes of illustration only and forming no part of the claimed design. 

The ornamental design for a desk adapter for removably mounting a portable file storage box, as shown and described. 